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Dry Superconducting Magnet Systems
Dry Variable-Temperature Superconducting Magnet System (Registered Trademark: CryoM®) Powered by a single 4K pulse tube or GM cryocooler to simultaneously cool the superconducting magnet and variable-temperature insert, this system offers simple operation, low operational costs, and highly expandable functionality, making it an ideal platform for low-temperature, high-field magnetic experiments in research applications.
CryoM integrates a 9T solenoid superconducting magnet with a 50 mm sample tube inner diameter, operating in a static helium environment and supporting a temperature range of<1.45 K–300K. Standard features include a 4-quadrant bipolar superconducting power supply, 4-channel high-precision temperature controller, 8-channel temperature indicator, cold head suspension damping, self-regulated circulating gas path, and a standard electrical testing sample rod with multi-pin vacuum feedthrough, 16-pin puck sample holder, cryogenic twisted-pair test cables, and low-magnetic-loss calibrated temperature sensors (calibration range: 1 K–325K). Optional configurations include 12T/14T/16T solenoid magnets, optically accessible split-coil pair magnets, and vector superconducting magnet systems.
Typical Technical Parameters | |||
Cold Head Type | GM Cryocooler or Pulse Tube Cryocooler | Magnetic Field Strength | ±9T (Solenoid) |
Sample Tube Inner Diameter (ID) | 50mm | Typical Excitation Time | ≤20min |
Initial Cooling Time | <15h( Pulse Tube Cryocooler ) <18h( GM Cryocooler ) | Temperature Range | <1.45K-300K |
Temperature Stability | ±10mK(1.5K-20K), ±15mK( 20K-300K ) | Sample Environment | Static Helium |
Optional Configurations | |||
Magnets | Rods | Inserts | Assemblies |
12T/14T/16T solenoid superconducting magnets | Single-axis/dual-axis sample rods | Dilution refrigerator insert | Ultra-low vibration assembly |
Split-coil pair superconducting magnets | Optical sample rods | AC susceptibility insert | Multi-pin/SMA/BNC/etc. vacuum feedthrough |
With horizontal optical window / triaxial vector magnet systems (e.g., 9/1/1 or 9/2/2) | He-3 insert | Thermal testing insert | Twisted-pair / flexible coaxial / semi-steel cable / triaxial / fiber optic |
CryoM offers optional configurations such as single-axis/dual-axis sample rods, optical sample rods, He-3 inserts, dilution refrigerator inserts, AC susceptibility inserts, thermal testing inserts, ultra-low vibration assemblies (e.g., cold head suspension damping, vibration-damping sandboxes), and terminal blocks.The ultra-low vibration CryoM, designed with valve-separated pulse tube and cold head suspension damping, achieves vibration levels<100 , making it particularly suitable for cryogenic high-field magnetic optical experiments.
CryoM Based on Valve-Separated Pulse Tube and Cold Head Suspension Design, Integrating a 300mK He-3 Insert
Additionally, we provide a cryogenic high-field material property testing system (TKMS) based on the CryoM, integrating functionalities such as electromagnetic transport measurements, Hall effect testing, AC susceptibility testing, and thermal transport analysis under cryogenic high magnetic fields. The system supports multi-sample testing modules, enabling simultaneous testing of multiple samples.
Typical Cryogenic High-Field Material Property Testing System (TKMS)
AC Susceptibility Module Typical Technical Parameters | ||
AC Susceptibility [ X ] | Sensitivity | ＜1x10-8 emu@10 kHz |
Phase Accuracy | ±0.5° | |
Drive Parameters | Amplitude | 0.01 to 16 Oe (peak) |
Frequency Range | 10 Hz to 10 kHz | |
Coil Set Dimensions | Bore Diameter | 8 mm |
Operational Range | 1.5K to 325 K; 0 to 16T（Sensitivity @ AC excitation of 10 mOe @10 kHz） | |
Notes | For zero-field | |
Temperature-Dependent AC Susceptibility Curve of Dy₂O₃ Powder-Sintered Bulk （left）& AC Susceptibility Sensitivity Testing at 10 kHz （Right ）
Installation Examples
▇ Dry Variable Temperature Superconducting Magnet System for a University in Northeast China
This system employs a GM cryocooler as the cooling source, featuring cold head suspension damping, a static exchange helium environment, and a 50 mm sample tube inner diameter. The minimum temperature is<1.35K, with a maximum magnetic field strength of 9T. A high-pressure sample rod compatible with diamond anvil cells is provided. The testing platform supports cryogenic high-field electromagnetic transport measurements under high pressure, Hall effect measurements, and multi-channel test switches for simultaneous testing of multiple ambient-pressure samples. Additionally, a motor-driven high-pressure rotary sample rod is included.
▇ Top Loading Strong Magnetic Field Cryogenic System for a University in East China
Powered by a single 4K GM cryocooler to simultaneously cool the superconducting magnet and variable-temperature insert, this system features simple operation, low operational costs, and highly expandable functionality. Designed for top-loading configurations, it provides a static exchange helium environment with a 50 mm sample tube inner diameter. The VTI and sample rod minimum temperature is<1.5 K, with a maximum magnetic field strength of 9T. Standard features include a 4-quadrant bipolar superconducting power supply, 4-channel high-precision temperature controller, and 8-channel temperature indicator for precise magnetic field and temperature control. The system employs patented cold head suspension technology and a unique self-regulated circulating gas path, achieving reduced vibration, faster cooldown rates, enhanced temperature stability, and longer maintenance intervals.
▇ Low-Vibration Dry Variable-Temperature Superconducting Magnet System for a University in East China
Powered by a valve-separated pulse tube cryocooler, this system incorporates patented cold head suspension damping technology, achieving nominal vibration levels<100 nm. Designed for top-loading configurations, it provides a static exchange helium environment with a 50 mm sample tube inner diameter. The minimum temperature is <1.5 K, and the maximum magnetic field strength reaches 9T.The sample rod is equipped with 36 SMA vacuum feedthroughs, 36 flexible coaxial cables, and 36-pin puck sample holders.
